Machine for drilling stay-bolts and similar work.



MACHINE I APPLICATION FILED HA3- 7, 1907.

Patented Apr. 6, 1909.

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WITNESSES: 211 7046 8 flwmwq/ J. A. EDEN, Jn. MACHINE FOR DRILLING STAYBOLTS AND SIMILAR WORK.

APPLIOATION FILED MAB. 7, 1907.

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FIG; 2.

INVENTOR WITNESSES: M

J. A. EDEN, JR. MACHINE FOR DRILLING STAY BOLTS AND SIMILAR WORK.

APPLIUATION FILED MAE. 7, 1907.

Patented Apr. 6, 1909.

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INVENTOR WITNESSES:

Mm W

AP PLIGATION FILED MAR- 7, 1907.

Patented. Apr. 6, 1909.

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INVENTOR 0 .J k N WOW i h k a a .5 [l j H 9 m fl Ad E N i i "0 W o. :zMWw WW 0/ W WITNESSES:

UNITED STATES PATENT OFFICE.

JAMES A. EDEN, 1a.,

'MACHINE FOR DRILLING STAY-BOLTS AND SIMILAR WORK.

Specification of Letters Patent.

Patented April 6, 1909.

Application filedv March 7, 1907. Serial No. 361,074.

To all whom it may concern:

Be it known that I, JAMES A. EDEN, Jr., a citizen of the United States,residing in the borough of Brooklyn, county of Kings, city and State ofNew York, have invented certain new and useful Improvements in Machinesfor Drilling Stay-Bolts and Similar Work, of which the -following is aspecification.

Stay-bolts,for'boilers are ordinarily attachedto the opposite plates ofa boiler, and are drilled from the outer end inwardly a suflicientdistance to permit the escape of water or steam when a bolt breaksbetween the two plates, and thus to indicate the fact of a break.

The present machine is designed to receive bolts, such, for example, asthe square-headed center-punched bolts or blanks made in the machinedescribed in vmy application for patent for machines for makingstay-bolts or the like pending concurrently herewith; and to drill asufliciently long hole in the outer ends of said bolts.

The complete machine includes a recepta .cle 1n whlch the bolts are madeto assume positions and to roll on to a carrier parallel upon which theyare clamped and carried in succession to points in line with one or moredrills. The drills are advanced and withdrawn at the proper times, andthe bolts are then carried to a position at which the manner of use.

they are ejected from the carrier.

The machine operates with great rapidity and accuracy, the output beingmany times 'as great as that of apparatus previously used for such work.

Other points of advantage are referred to in detail hereinafter.

The accompanying drawings illustrate a machine embodying the invention.

Figure 1 is a plan of the complete machine. Fig. 2 is an end elevationof the same, partly broken away. Fig. 3 is a diagram of the finishedproduct of the machine, showing Fig. 4 is a side elevation of thecomplete machine, omitting the feed tray. Fig. 4 is a detail. Fig. 5 isa transverse section approximately on the line ranged parallel to each-eral bolts on one another, as shown.

5-5 of Figs. 1 and 4. Fig. 6 is a diagram of the escapement mechanismfor the carrier.

Referring to the embodiment of .the

invention illustrated, the bolts A are arother in a pile in a rece taclesuch as the tray B, from which they. are fed to an intermittentlyrotating carrier, which I designate as a whole by the letter C. Thiscarrier moves each bolt in succession to a plurality of drills, such,for example, as the three drills D, E and F. The first drill I) enterssay one-third of the desired distance, and is then withdrawn, afterwhich. the second drill extends the holea third of the distance farther,after which the third drill enters to the final depth. This division ofwork not only saves the drills, but permits of working on a plurality ofbolts at once, and discharging them at a rate ap roximately three timesas great as if all t e work had to be done by a single drill.

As shown in Fig. 3, the bolt A is designed to fasten together an innerboiler plate G and an outer one H, and is provided with a cen tral holeJ extending from the outer end to well within the space between the twoplates.

The bolts maybe carelessly stacked in the tray B, approximately parallelwith each other. The feeding from this point is automatic, so that noskill is required to attend the machine. The tray is pivoted at K, andits outer end swings down about 15 degrees and up again slowly. Theupward movement of the outer end of the tray rolls the bolts into aguide or trough L, keepingthe latter filled. The downward movement ofthe outer end of the tray is below the level of the pivot and throws thebolts into the back of the tray, clearing the hinge and relieving thebolts in the trough L from the pressure.

OF NEW YORK, Y2, ASSIGNOR- 'l() E. W. BLISS COMPANY, OF BROOKLYN, NEWYORK, A CORPORATION OF WEST VIRGINIA.

The drawings, Figs. 2 and 4, show the tray in the middle position of itsoscillation. To

end is made higher than the diameter of a single bolt, preferably of aheight equal to sev- This rolling of the bolts in the tray back andforth causes them to settle into parallel positions.

being controlled from fixed mately balancing the weight carrier C. The

The tray B is connected lg means of a link M with an operating arm .Lupon a shaft 0. The link M mcludes a friction device M by which thelower end of the link isfrictionally clamped to the upper end, the jointhemg arranged to ield 1n case of any obstruction and avoid reaking ofthe arts. As these machines are fed by cheap abor, the blanks are thrownin in all positions, and many thin s besides blanks are occasionallythrown in, t e friction device is of great importance in connection withthis oscillating tray. The shaft 0 has at" its opposite end (Fig. 4) anarm P oscillated slowly by means of a link Q connected with a crank-pin,.upon a slowspeed gear R driven by means of a pinion S upon a shaft Twhich is rotated by means of a worm ear U anda-worm'V upona longitudinals aft W upon. which is splined a large gear X rotated by-means of ainion Y upon the driving shaft Z of the macliine, the latter and loose'belt pulleys a and b. The arm N is extended and provided with acounterweight c approxi- 'of the tray B and its contents. The trough Lis preferably fixed, and inclined sharply downward to the tray B has afixed upwardly projecting side 01 serving as a stop to determine theendwise position of the bolts in the tray, and to insure that the boltsshall be properly positioned for the drills. In order to provide forbolts of greater or less length, the opposite side (1 of the tray ismade adjustab e, as by means of the slots and screws shown, or in anyother suitable way. A similar arrangement of one fixed side 0 and oneadjustable side e is provided for the guide or trou h L, and the latteris provided with over anging flan es ff or similar devices forholdingthe bo ts down against their tendency to bunch up under theeffect of their own weight.

The carrier C consists of a pair of heads mounted upon a shaft 9 andhaving peripheral sockets in which the ends ofthe bolts rest. Each headconsists .of a pair of plates, 72 h res ectively, which are angularly adjusta le re atively to each other, as by means of a set of holes k 7'(Fig. 2) which are arranged vernierwise around the plates, so

that by bringing oneor the other set'of holes in conjunction, andintroducing a dowel i they will be held in the desired position ofadjustment relatively to each other. This. adjustment causes the notchesin in the plates to overlap in the manner indicated, so that theeffective width of the notches may be varied in accordance with thediameter of the bolts to he carried.

It is to be noted that in order to reserve the center of the boltsalways at t e-same point, it is necessary toshift not merel one of theplates but both of them simu taneof a set-screw m. It is bolts frombeyond the pivot O means of screws They are therefore both mountedloosely on the shaft g, and are held in proper angular position thereonby means of one or more slots 72.. in the headsl 1' respectively,through which pass bolts h screwin at fixed points throu h one of themovab e lates. he head I a ljacent to the drills is pre erabl' fixed onthe s aft, while the opposite head i carrying the plates 7:. and j andprojecting radially beyond them so as to form end stops or gages forthebolts, dinally on the shaft 9 and fastened by means proposed torotatethe carrier C with rapid intermittent movements, and it is advisable toprovide a guard such as a pair of springs n to prevent the eing' thrownout in passing from the receiving position at the top to the firstboring position.

It.1s important to clamp the bolts firmly in position while they arebeing bored, to

prevent any lateral strain upon the drills.-

or this purpose I provide a series of'holding pins 0 p g with their endsshaped to angles approximately tangential to the carrier, and backed bystrong springs 1' adjustable by sin sockets in a frame t which has alateral reciprocating movement in a frame it rigidly mounted upon thebase of the machine. The movement of the sliding frame t is obtained bya to gle mechanism. Links '0 at the upper and? the sliding frame areconnected to inner arms w of a vertical shaft 2:, the shaft having acentral arm y on its outer side whichis connected by means of a link zto a roller running in a cam groove 4 of a disk 2 (Fig. 1) mount ed onthe slowly revolving shaft 3 and which cam groove gives the roller andthe rod z the desired movements backward and forward.

The three drillsare carried on the ends of spindles 5 which are providedwith hearings in fixed standards 6 and 7, and the "ends of which aremounted in a carriage 8 which is reciprocated by means of a cam 9 alsoon the shaft 3 and engaging a roller 9 on an ower ends of is adjustablelongituarm of the carriage. They are rotated by means of small pinions10 arranged around the drum or wide gear); the center of whichcorresponds with the center of the carrier for the bolts, so that thedrills are concentric with this carrier. The drum X is of sufficientwidth to be in enga ement with the pinions 10 on 'the drill spin es 5throughout their necessary reciprocation.

The drumli and the parts driven directly thereby are rotatedcontinuously. A very simple mechanism is provided for transforming thiscontinuous movement into a guick intermittent movement of the carrierThe shaft 9 of the carrier is rovided on its inner end with a locking 11and a friction disk 12. A com lementary friction disk 13 is mountedfixed shaft .W of the. drum X, and is pressed outy on the end ofthe' andready uided springs 14, so as to forma friction c the shaft W and theshaft There is a constarit frictional engagement, and the shaft 9receives a quick movement between its release and its'locking by anescapement provided for the purpose.

The locking plate 11 is rovided with locking notches 15 corres on ing ininterval with the feeding interva s and adapted to be enga ed by a bolt16 (Fig. 4) sliding in a suita ly fixed guide, and attached to the endof the arm 17 upon a transverse shaft 18 which is connected by means ofa link 19 with an arm 20 of a lever, the other arm 21 of which isprovided with a roller lying in the path of a cam 22 upon the disk 2.When the cam or tap et 22 strikes the arm 21 the'bolt 16 is with rawn,and the shaft g allowed to turn, the tappet 22 being so short that theosibolt 16 will be released and will be in tion to jump into the nextnotch of the ocking plate so as to hold the carrier in the nextposition. The locking bolt is normally pressed toward the lockmg plate11 by means of a spring 23 (Fig. 6). Where, however, the movement ofthecarrier is very rapid, as com ared with that of the disk 2, an additionastop may be provided for preventing the carrier from overrunning itsintended interval before the locking bolt 16 can slip into place. Such ameans is shown in Fig. 5, and comprises a locking pawl 24 havin anoutwardly projecting arm 25 upon which bears an arm 26 on the outer endof the shaft 18. A spring 27 presses upon the arm 25 and holds the pawl24 against the notched plate 11. Now when the locking bolt 16 iswithdrawn, the pawl 24 is immediately pressed yieldingly against theplate 11, and, as the latter rotates, the hooked end of the pawl dropsinto the next notch, the positions being such that this action takesplace intermediate between two successive positions of the disk. Whenthe stop 22 has passed, and the locking bolt 16 is released for action,the pawl 24 is withdrawn. To permit the withdrawal of the pawl 24 whilethe locking bolt 16 is still held back, a spring 28 (Fig. 4*) may beintroduced between the shaft 18 and the locking vbolt 16.

parts may be made by those skilled in the art without departure from theinvention.

What I claim is 1. In a ma hine of the class described, a pivotedreceptacle adapted to receive bolts and open at its discharge end sothat bolts may roll out of said end, and havin a flat bottom and a rearwall of greater hei ht than the diameter of a bolt, .and means foroscillating it about its pivot above and below a.

horizontal position whereby bolts laid on said bottom in variouspositions are caused to assume positions parallel to the pivot so as toroll out of the discharge end.

2. In a machine of the class described, the combination of a fixeddownwardly inclined trough L for feeding bolts to a carrier, and a trayB having its open end pivoted adjacent to the upper end of the trough Land having a fiat closed bottom upon which the bolts may be laid invarious positions, and a rear wall of greater height than the diameterof a bolt, and means for oscillating said tray to cause the bolts toassume'posltions parallel to the pivot so as to roll into said trough.

3. In a machine of the class described, a movable carrier comprising twoplates and having a notch for receiving a bolt and transferring it fromone point to another, the opposite sides of said notch being formed byedges on the respective plates and both plates being adjustable so as toreceive bolts of different diameters with their centers always in thesame line.

4. In a machine of the class described, a movable carrier having twomembers each provided with a plurality of notches for receiving boltsand transferring them from one point to another, and one adjustablerelatively to the other to cause the notches to overlap so as to reducethe effective width thereof and adapt them for bolts of differentdiameters. I

5. In a machine of the class described, a carrier 0 having a pair ofheads with peripheral sockets for receiving bolts, a shaft g on whichsaid heads are mounted, each head comprising a pair of notched plates h,j, and h, j, respectively, the lates of each pair being angularlyadjustabfe relatively to each other to vary the effective widths of thesockets, and each head being angularly adjustable on said shaft tomaintain the centers of the bolts always in the same lines.

6. In a machine of the class described, a notched carrier comprising ashaft, pairs of notched plates arranged to receive a bolt, one pair forreceiving each end of the bolt, the notched plates being angularlyadjustable relatively to each other, and a plate angularly fixed on saidshaft and adjustably attached to said notched plates for determiningtheir angular position on the shaft.

7. In a machine of the class described, a notched carrier,- a series ofholding pins 0, p

and g, a frame t having socketsparryjng said my name in the presence oftwo subscribing pins, spring?i 1?- in 'sgjd sockegs pressmg saig iwltnesses.

ins outwar y, an means or movm' g sai ame toward or away from saidearner to 3 JAMES EDEN 5 cause said ins to engage or to release boltsWitnesses:

in the note es of the carrier. DOMINGO A. USINA,

In witness whereof, I have hereunto signed 1 THEODORE T. SNELL.

